Please answer question number 2 based on the the data table. Activity No. 8Determination of Chloride Ion Concentration by GravimetryGravimetric analysis is a method in quantitative analysis where an unknown sample is dissolvedin an appropriate solvent, and the analyte is converted to an insoluble form or precipitation of a knowncompound and then weighing the precipitate. In order to do a gravimetric analysis, a cation must be foundthat forms an insoluble compound with chloride. Ions such as Ag+, Pb²+, and Hg₂²+ form insoluble chlorides.Therefore, silver chloride (AgCl) could be used to determine % Chloride (CI), because it is insoluble and itcan be formed pure and is easily filtered.Ag+ (aq) + Cl(aq) →→ AgCl(s)One of the most useful applications of gravimetric analysis is the determination of chloride innatural waters such as seawater and water in rivers and lakes. In this experiment the chlorine content ofan unknown soluble chloride salt is to be determined. The unknown is dissolved in distilled water anddilute silver nitrate solution is added to precipitate out the chloride as AgCl.NaCl(aq) + AgNO3(aq) → NaNO3(aq) + AgCl(s)Note that all of the aqueous species in the above reaction exists as ions in solution:NaCl(aq) exists as Na+ and ClAgNO3 exists as Ag* and NO3NaNO3(aq) exists as Na+ and NO3AgCl(s) is a white solidProcedure Link: https://www.youtube.com/watch?v=dERZhN-01f8 DataUnknown Number: 345Trial 2Trial 3Mass unknown, g0.10150.1205Mass crucible, g20.195519.1986Mass crucible + precipitate, g20.524619.4873Mass precipitate, g0.32910.2887Mass chloride, g0.081400.0714159.2610%% Chloride in unknown80.1994%Average % Chloride: 68.2792%Standard deviation: 10.7666Show Calculations for Trial 1:a. Mass of Chloride, gb. % ChlorideQuestions:1. When the unknown sample was dissolved in 100 mL water, 6 M nitric acid (HNO3) was used to acidifythe solution. Why shouldn't any acid such as HCI and H₂SO4 be used in this process?2. For Trial 1, how many grams of AgNO3 must be added to the solution to completely react with NaCl?Trial 10.134521.352121.70760.35550.0879365.3773%

No of moles of chloride ion = Moles of NaCl Also, 1 mol NaCl reacts with 1 mol of AgNO3. And, No of…

Answered: 2. For Trial 1, how many grams of AgNO3…

Science

Chemistry

2. For Trial 1, how many grams of AgNO3 must be added to the solution to completely react with NaCl?

Appl Of Ms Excel In Analytical Chemistry

2nd Edition

ISBN:9781285686691

Author:Crouch

Publisher:Crouch

Chapter3: Statistical Tests With Excel

Section: Chapter Questions

Problem 5P

See similar textbooks

Similar questions

Potassium hydrogen phthalate is a solid, monoprotic acid frequently used in the laboratory as a primary standard. It has the formula KHC8H4O4. This is often written in the short-hand notation as KHP. If 25.0mL of a potassium hydroxide solution are needed to neutralize 2.26g of KHP, what is the molarity of the potassium hydroxide solution? Potassium hydrogen phthalate sometimes called potassium biphthalate, as shown on this bottle is an acid that is convenient to store and use because it is a solid.
The concentration of arsenic in an insecticide can be determined gravimetrically through its precipitation as MgNH4AsO4. After the formation of the precipitate, it must be ignited for total conversion to Mg2As2O7, which is then cooled and weighed. Considering that a sample of 1,627 g of the insecticide produced 106.5 mg of Mg2As2O7, determine the% (m/m) As2O3 in the insecticide. Given the molar masses: Mg2As2O7 = 310.447 g / mol and As2O3 = 197.841 g / mol
The concentration of CO in air is determined by passing a known volume of air through a tube that contains I2O5, forming CO2and I2. The I2 is removed from the tube by distilling it into a solution that contains an excess of KI, producing I3-. The I3-is titrated with a standard solution of Na2S2O3. In a typical analysis a 4.79-L sample of air is sampled as described here, requiring 7.17 mL of 0.00329 M Na2S2O3 to reach the end point. If the air has a density of 1.23 × 10–3 g/mL, determine the parts per million CO in the air
A student weighed out 3.5689g of unknown nickel salt and carried out the gravimetric analysis in order to determine the % nickel in the unknown sample. The mass of one of the two bis(dimethylglyoximate) nickel(11) precipitates that was filtered was 0.1570g. How many moles of Ni 2+ are in the precipitate?
Solution of Pb(NO3)2 and NaCl are combined, resulting in concentrations of 0.0050 M Pb(NO3)2 and 0.00250 M NaCl immediately upon mixing. select the correct description of the final solution, given that the Ksp of PbCl2 is 1.7x10^-5. A) NaNO3 Precipitates B) All solutes reamin soluable C) Pb(NO3)2 precipitates D) PbCl2 precipiates E) All Solutes precipitate.
The molar mass of potassium hydrogen phthalate (KHC8H4O4, abbreviation KHP) is 204.22 grams per mole. To determine the molarity of an unknown NaOH solution, a student weighed out 1.32 g of solid KHP and dissolved the solid in 25.4 mL of DI water. The resulting solution was used in a titration with the unknown NaOH solution (3 drops of phenolphthalein was used as an indicator). The balance chemical equation is given below. If the student used 15.06 mL of the unknown NaOH solution in the titration, what is the molarity of the NaOH solution?
A sample of freshly precipitated and filtered silver chloride weighs 459.0 mg. If 1.00 % of the silver chloride becomes photo decomposed, what is the precipitate’s weigh?
Subject: PHARMACEUTICAL ANALYSIS - Activity Which Instrument Methods of Analysis are suited for the following studies and explain why? 1. Compatibility of excipients of newly formulated amlodipine tablets 2. Determination of total sodium ion content in french fries 3. detection of heavy metal content in water from water drinking fountain
Ca2+ in a drinking water sample was analyzed by the following reactions below: Ca2+(aq) + C2O42-(aq) → CaC2O4 (s) → CaO(s) + CO(g)+ CO2(g) First an excess of C2O42- was added to 0.10 L of the Ca2+ water sample. Then CaC2O4 was precipitated, which was demcomposed into CaO with filtering and some heat. The CaO was measured to be 5.61 mg. What is the concentration of Ca2+ in the original water sample? The MW of CaO is 56.1 g/mol. 0.0100M 0.0010 M 1.00 M 0.100 M The partition coefficient (K) of methylamine (CH3NH2) is 4.50, preferring the organic layer over the aqueous layer in this extraction. The Ka of methylammonium (CH3NH3+) is 2.00 x 10-11. If 10 mL aqueous methylamine solution at pH 11.0 is extracted with 20.0 mL organic solvent, what is the fraction of solute remaining in the water (q)? HINT: methylamine is a weak base. 14.3% 10.0% 18.2% 81.8%
Imagine an experiment in which the percentage of manganese, Mn, in a manganese ore is to be determined by gravimetric analysis. If 0.8423g of the more yielded 0.3077g of Mn3O4 precipitate what is the percentage Mn in the ore
What is the minimum concentration of Ca2+ (M or mol/L) required to form a precipitate with a 0.025 M Na3PO4 solution? (Ksp for Ca3(PO4)2 is 1.0 × 10-26) Enter your answer as scientific notation with the correct number of sig figs, without any units. Use the format #e#
Which of the following is not one of the properties of the precipitate in the gravimetric analysis method?A.Should be easily drainedB. resolution should be lowC. must be volatileD. should not react with atmospheric components